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POST-RETIREMENT BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2017
Employee Benefits [Abstract]  
Post-employment amounts
The weighted average duration of the defined benefit obligation is 10 years (2016: 10 years).
 
 
Less than a year

Between 1-2 years

Between 2-5 years

Over 5 years

Total

Pension benefits

$18


$19


$54


$313


$404

Other post-retirement benefits
1

1

2

6

10

At December 31, 2016

$19


$20


$56


$319


$414

Pension benefits
14

14

39

200

267

Other post-retirement benefits
1

1

2

5

9

At December 31, 2017

$15


$15


$41


$205


$276

The amounts recognized in the balance sheet are determined as follows:
For the years ended December 31
2017

2016

Present value of funded obligations

$122


$198

Fair value of plan assets
(134
)
(191
)
(Surplus) deficit of funded plans

($12
)

$7

Present value of unfunded obligations
54

59

Total deficit of defined benefit pension plans

$42


$66

Impact of minimum funding requirement/asset ceiling
—

—

Liability in the balance sheet

$42


$66

The table below outlines where the Company’s post-employment amounts and activity are included in the financial statements: 
For the years ended December 31
2017

2016

Balance sheet obligations for:
 
 
Defined pension benefits

$42


$66

Other post-retirement benefits
6

6

Liability in the balance sheet

$48


$72

Income statement charge included income statement for:
 
 
Defined pension benefits

$1


$4

Other post-retirement benefits
—

—

 

$1


$4

Measurements for:
 
 
Defined pension benefits

$23


$11

Other post-retirement benefits
—

—

 

$23


$11
Significant actuarial assumptions
The significant actuarial assumptions were as follows:

 
As at December 31
Pension Plans 2017
Other Post-Retirement Benefits 2017

Pension Plans 2016
Other Post-Retirement Benefits 2016

Discount rate
2.90-3.95%
3.75
%
2.10-3.90%
3.70
%